fbtab man page on SmartOS

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       logindevperm, fbtab - login-based device permissions


       The  /etc/logindevperm  file  contains  information  that  is  used  by
       login(1) and ttymon(1M) to change the owner, group, and permissions  of
       devices	upon logging into or out of a console device. By default, this
       file contains lines for the keyboard, mouse, audio,  and	 frame	buffer

       The  owner  of  the  devices  listed in /etc/logindevperm is set to the
       owner of the console by login(1). The group of the devices  is  set  to
       the  owner's group specified in /etc/passwd. The permissions are set as
       specified in /etc/logindevperm.

       If the console is /dev/vt/active, the owner of the devices is the first
       user  logged  in on the consoles (/dev/console or /dev/vt/#). Upon this
       first user's logout the owner and group of these devices	 is  reset  by
       ttymon(1M) to owner root and root's group as specified in /etc/passwd.

       Fields are separated by a TAB or SPACE characters. Blank lines and com‐
       ments can appear anywhere in the file; comments start with a  hashmark,
       (#), and continue to the end of the line.

       The  first  field  specifies the name of a console device (for example,
       /dev/console). By default, it is /dev/vt/active, which  points  to  the
       current active console, including /dev/console and all virtual consoles
       (/dev/vt/#). The second field specifies the permissions	to  which  the
       devices	in  the device_list field (third field) are set. These permis‐
       sions  must  be	expressed  in  octal  format,  for  example,  0774.  A
       device_list  is	a  colon-separated list of device names. A device name
       must be a /dev link.

       A directory or logical name in the device name can be either one of the

	   o	  A fully qualified name, for example, fbs.

	   o	  A regular expression, for example, [a-z0-9.]+. See regexp(5)
		  for more information on regular expressions.

	   o	  The wildcard character * specifying all  directory  or  node
		  names	 (except  .  and .., for example, /dev/fbs/* specifies
		  all frame buffer devices.

       Some examples of /etc/logindevperm file entries include:


       Specify all ugen(7D) endpoints and status nodes.

       Drivers can also be specified to limit the permission changes to	 minor
       nodes owned by the specified drivers. For example,

	 /dev/console	 0600	 /dev/usb/[0-9a-f]+[.][0-9a-f]+/[0-9]+/* \
	 driver=usb_mid,scsa2usb,usbprn	 # libusb devices

       Due  to	the  persistence of devfs(7FS) minor node management, the user
       should be logged in as root if the list of minor nodes will be  reduced
       and the devices should all be plugged in.

       Once the devices are owned by the user, their permissions and ownership
       can be changed using chmod(1) and chown(1), as  with  any  other	 user-
       owned file.

       Upon  logout  the  owner	 and  group of these devices are reset by tty‐
       mon(1M) to owner root and root's	 group	as  specified  in  /etc/passwd
       (typically  other).  The	 permissions  are  set	as  specified  in  the
       /etc/logindevperm file.

		      File that contains user group information.

       chmod(1),  chown(1),  login(1),	 ttymon(1M),   passwd(4),   regexp(5),

       /etc/logindevperm  provides a superset of the functionality provided by
       /etc/fbtab in SunOS 4.x releases.

				 Sep 25, 2008		       LOGINDEVPERM(4)

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